期刊论文

Activation of calcium aluminate leaching residues and their application in treatment of zinc metallurgical wastewater

Zheng, Y.-J.

中文

中国有色金属学报

1004-0609

2019

29

5

1073-1082

10.19476/j.ysxb.1004.0609.2019.05.21

湖南省重点研发计划项目（2017SK2254）~~；

本校为其他机构

以PAC生产过程中铝钙粉浸出渣为原料,采用盐酸和氢氧化钠进行活化,并对其在锌冶炼废水中吸附重金属的性能进行研究。考察铝钙粉浸出渣及其活化产物结构、比表面积、孔结构的变化,分析了pH值、吸附时间和重金属浓度对其吸附性能的影响,并以氢氧化钠活化产物为吸附剂进行了工业实验。结果表明:铝钙粉浸出渣经盐酸和氢氧化钠活化后,其结构均由岛状变为层状。铝钙粉浸出渣、盐酸活化产物和氢氧化钠活化产物的比表面积分别为21.8、63.1、28.1m~2/g,BJH孔径分别为36.06、43.54和236.35 nm,孔容分别为0.03、0.09和0.14 cm~3/g。pH=8,吸附温度为25 ℃,吸附时间为150 min时,由Langmuir方程得到铝钙粉浸出...

The calcium aluminate leaching residues(CALR), which were from the process of polyaluminum chloride production, were activated by hydrochloric acid and sodium hydroxide, respectively, and the adsorption properties CALR and activation products on heavy metals in zinc metallurgical wastewater were researched. The change of structure, specific surface area, pore structure of CALR and activation products were investigated. The effects of pH value, adsorption time and heavy metal concentration on its adsorption performance were analyzed. The industr...